feat(v12): use server-defined default limits for channel and channel lists

[oliverlaz]

🎯 Goal

Backport of #2940 to our v12-release line.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.02%. Comparing base (c8e9542) to head (490a488).
⚠️ Report is 2 commits behind head on release-v12.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-v12    #2942      +/-   ##
===============================================
- Coverage        81.04%   81.02%   -0.03%     
===============================================
  Files              472      472              
  Lines            10008     9997      -11     
  Branches          2360     2417      +57     
===============================================
- Hits              8111     8100      -11     
+ Misses            1774     1513     -261     
- Partials           123      384     +261     

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